#include <stdio.h>

int main(void)
{
	int day=0;
	printf("今天星期几？(1~7)\n");
	scanf("%d",&day);
	switch(day){
		case 1:
		case 2:
		case 4:
			printf("酸辣土豆丝\n");
			break;
		case 3:
		case 5:
		       printf("番茄炒蛋\n");
		       break;
		case 6:
		       printf("鱼香肉丝\n");
		       break;
		case 7:
		       printf("大闸蟹\n");
		       break;
		default:
			printf("吃空气\n");
		       break;
	}
	return 0;
}
